not to dissagree with anybody but dont use pb blaster get your self some fogging spray or zep 45. i used pb blaster in a short block once and used every percausion and the pb actually stained my cyclinder bore and i had rust stain that i had to use clr on to remove.i even turned the motor over weekely on the stand had it bagged and all. since then i have used fogging oil spray or zep 45 spray it has teflon in it that stuff works great it puts a nice coating on things